Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier

Nik Krstajic, David Childs, Negin Peyvast, Deepa Kasaragod, Stephen J. Matcher, Igor Krestnikov, Richard Hogg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We describe a simple swept-laser design that characterizes the emission bandwidth, linewidth, spectral shape and output noise. A short cavity Littmann configuration is used in which the semiconductor optical amplifier (SOA) lasing wavelength is tuned by a galvanometer with an 830 grooves per mm diffraction grating. A 3dB coupler extracts light from the cavity formed by the grating and end-mirror and the optical output uses to illuminate a balanced swept source optical coherence tomography (SS-OCT) interferometer incorporating a circulator, 3dB coupler, dispersion compensator and balanced detector. The SOA (SOA-1200-70-PM-20sB, Innolume GmbH) uses a novel III-V semiconductor quantum-dot gain medium. ASE is emitted between 1150nm and 1300nm at a drive current of 700mA. When used in the Littmann cavity laser a coherence length of about 10mm is produced, which is tunable over 60nm. The peak output power is 12mW. The swept-laser has been incorporated into a fiber-based SS-OCT system and used to image biological tissues. Axial resolution in air is 12 microns. Images of human palmar skin in-vivo are demonstrated, showing good resolution and contrast, with the stratum corneum, epidermis, rete ridges and epidermal-dermal junction visualized.

Original languageEnglish
Title of host publicationOptical Coherence Tomography and Coherence Techniques V
Volume8091
DOIs
Publication statusPublished - 1 Aug 2011
EventOptical Coherence Tomography and Coherence Techniques V - Munich, Germany
Duration: 24 May 201126 May 2011

Conference

ConferenceOptical Coherence Tomography and Coherence Techniques V
CountryGermany
CityMunich
Period24/05/1126/05/11

Fingerprint

Quantum Dots
Semiconductors
Semiconductor optical amplifiers
Optical tomography
Optical Coherence Tomography
light amplifiers
Semiconductor quantum dots
Light sources
light sources
Lasers
tomography
quantum dots
Light
evaluation
Galvanometers
couplers
lasers
output
Laser resonators
Diffraction gratings

Keywords

  • OCT
  • quantum dot
  • skin
  • SOA
  • swept-laser

Cite this

Krstajic, N., Childs, D., Peyvast, N., Kasaragod, D., Matcher, S. J., Krestnikov, I., & Hogg, R. (2011). Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier. In Optical Coherence Tomography and Coherence Techniques V (Vol. 8091). [80911S] https://doi.org/10.1117/12.889247
Krstajic, Nik ; Childs, David ; Peyvast, Negin ; Kasaragod, Deepa ; Matcher, Stephen J. ; Krestnikov, Igor ; Hogg, Richard. / Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier. Optical Coherence Tomography and Coherence Techniques V. Vol. 8091 2011.
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abstract = "We describe a simple swept-laser design that characterizes the emission bandwidth, linewidth, spectral shape and output noise. A short cavity Littmann configuration is used in which the semiconductor optical amplifier (SOA) lasing wavelength is tuned by a galvanometer with an 830 grooves per mm diffraction grating. A 3dB coupler extracts light from the cavity formed by the grating and end-mirror and the optical output uses to illuminate a balanced swept source optical coherence tomography (SS-OCT) interferometer incorporating a circulator, 3dB coupler, dispersion compensator and balanced detector. The SOA (SOA-1200-70-PM-20sB, Innolume GmbH) uses a novel III-V semiconductor quantum-dot gain medium. ASE is emitted between 1150nm and 1300nm at a drive current of 700mA. When used in the Littmann cavity laser a coherence length of about 10mm is produced, which is tunable over 60nm. The peak output power is 12mW. The swept-laser has been incorporated into a fiber-based SS-OCT system and used to image biological tissues. Axial resolution in air is 12 microns. Images of human palmar skin in-vivo are demonstrated, showing good resolution and contrast, with the stratum corneum, epidermis, rete ridges and epidermal-dermal junction visualized.",
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author = "Nik Krstajic and David Childs and Negin Peyvast and Deepa Kasaragod and Matcher, {Stephen J.} and Igor Krestnikov and Richard Hogg",
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Krstajic, N, Childs, D, Peyvast, N, Kasaragod, D, Matcher, SJ, Krestnikov, I & Hogg, R 2011, Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier. in Optical Coherence Tomography and Coherence Techniques V. vol. 8091, 80911S, Optical Coherence Tomography and Coherence Techniques V, Munich, Germany, 24/05/11. https://doi.org/10.1117/12.889247

Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier. / Krstajic, Nik; Childs, David; Peyvast, Negin; Kasaragod, Deepa; Matcher, Stephen J.; Krestnikov, Igor; Hogg, Richard.

Optical Coherence Tomography and Coherence Techniques V. Vol. 8091 2011. 80911S.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - We describe a simple swept-laser design that characterizes the emission bandwidth, linewidth, spectral shape and output noise. A short cavity Littmann configuration is used in which the semiconductor optical amplifier (SOA) lasing wavelength is tuned by a galvanometer with an 830 grooves per mm diffraction grating. A 3dB coupler extracts light from the cavity formed by the grating and end-mirror and the optical output uses to illuminate a balanced swept source optical coherence tomography (SS-OCT) interferometer incorporating a circulator, 3dB coupler, dispersion compensator and balanced detector. The SOA (SOA-1200-70-PM-20sB, Innolume GmbH) uses a novel III-V semiconductor quantum-dot gain medium. ASE is emitted between 1150nm and 1300nm at a drive current of 700mA. When used in the Littmann cavity laser a coherence length of about 10mm is produced, which is tunable over 60nm. The peak output power is 12mW. The swept-laser has been incorporated into a fiber-based SS-OCT system and used to image biological tissues. Axial resolution in air is 12 microns. Images of human palmar skin in-vivo are demonstrated, showing good resolution and contrast, with the stratum corneum, epidermis, rete ridges and epidermal-dermal junction visualized.

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Krstajic N, Childs D, Peyvast N, Kasaragod D, Matcher SJ, Krestnikov I et al. Evaluation of a swept-laser optical coherence tomography light source based on a novel quantum-dot based semiconductor optical amplifier. In Optical Coherence Tomography and Coherence Techniques V. Vol. 8091. 2011. 80911S https://doi.org/10.1117/12.889247